Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt

Schedule of outstanding convertible note balances

	June 30, 2015
Liability component:
Principal	$	200,000
Less: debt discount, net	(29,183		)
Net carrying amount	$	170,817
Equity component	$	38,188

Schedule of total interest expense recognized related to the Convertible Notes

	Three Months Ended June 30, 2015		Six Months Ended June 30, 2015
Contractual interest expense	$	1,250	$	2,500
Amortization of debt issuance costs	246		480
Amortization of debt discount	1,727		3,376
Total interest expense	$	3,223	$	6,356